Krayan is a district in Nunukan Regency, North Kalimantan, Indonesia.

It is located on the west side of Nunukan Regency and borders the state of Sabah and Sarawak in Malaysia.

The district consists of 65 villages, while the main town is Long Bawan.

The district is renowned to be a major rice producer in Nunukan regency, specifically of a variety called Adan rice, and is marketed widely in nearby Malaysia and Brunei.

Some part of the Kayan Mentarang National Park area is located in this district.